Bump google.golang.org/grpc in /_examples/kubernetes-sample

Bumps [google.golang.org/grpc](https://github.com/grpc/grpc-go) from 1.46.2 to 1.56.3.
- [Release notes](https://github.com/grpc/grpc-go/releases)
- [Commits](grpc/grpc-go@v1.46.2...v1.56.3)

---
updated-dependencies:
- dependency-name: google.golang.org/grpc
  dependency-type: indirect
...

Signed-off-by: dependabot[bot] <support@github.com>

_examples/kubernetes-sample/go.mod

@@ -52,14 +52,14 @@ require (
 	go.opentelemetry.io/otel/trace v1.16.0 // indirect
 	golang.org/x/exp v0.0.0-20220518171630-0b5c67f07fdf // indirect
 	golang.org/x/net v0.15.0 // indirect
-	golang.org/x/oauth2 v0.6.0 // indirect
+	golang.org/x/oauth2 v0.7.0 // indirect
 	golang.org/x/sys v0.12.0 // indirect
 	golang.org/x/term v0.12.0 // indirect
 	golang.org/x/text v0.13.0 // indirect
 	golang.org/x/time v0.0.0-20220411224347-583f2d630306 // indirect
 	google.golang.org/appengine v1.6.7 // indirect
-	google.golang.org/genproto v0.0.0-20230306155012-7f2fa6fef1f4 // indirect
-	google.golang.org/grpc v1.55.0 // indirect
+	google.golang.org/genproto v0.0.0-20230410155749-daa745c078e1 // indirect
+	google.golang.org/grpc v1.56.3 // indirect
 	gopkg.in/inf.v0 v0.9.1 // indirect
 	gopkg.in/yaml.v2 v2.4.0 // indirect
 	gopkg.in/yaml.v3 v3.0.1 // indirect